Oil bath air cleaner construction



Filed June 21, 1949 ammo to:

ATTORNEYS Patented Mar. 11, 1952 OFFICE OIL BATH AIR CLEANER CONSTRUCTION John H. Mills, Jackson, Mich., assignor to Glynn Trolz, Jackson, Mich.

Application June 21, 1949, Serial No. 100,411

1 Claim.

This invention relates to air cleaning apparatus and has particular reference to air cleaner apparatus employed in connection with internal combustion engines to clean the air supply thereto, and of the oil or other liquid bath and up-flow type.

An object of the invention is to provide air cleaner apparatus which, while eificient in use, is of relatively simple and convenient construction and can be readily assembled and dismantled.

Another object of the invention is to provide an air cleaner apparatus of the oil or liquid bath type having an improved form of body part for containing the liquid, in that with the present invention the body part is made from a light transmitting material and has liquid level mark-- ings thereon with respect to which the liquid content within the body part can be readily discerned from outside the air cleaner apparatus without having to dismantle the same.

The invention also has for its object to provide an air cleaner apparatus having an improved and novel body construction, which provides for the assembling and operative locating of the parts in a simple and economical manner.

The above and other objects and advantages of the invention residing in the construction, combination and arrangement of parts will appear clearer from a consideration of the following description with reference to the drawings and from the annexed claim.

In the drawings:

Fig. I is a vertical section of one construction of air cleaner apparatus according to the invention, the portion of the outside wall of the plastic light transmitting body part containing the liquid level markings being shown in elevation,

Fig. II is a plan view of the :body part of Fig. I, with the combined cover and filter unit shown dotted in position and the bail being shown dotted in its lowered position, and

Fig. III is an end view of the separate duct piece.

Referring to the drawings, the air cleaner apparatus shown therein comprises a cup-like body part I0, adapted to hold a body of oil or other liquid, indicated at 12, and to be closed on top by a combined cover and filter unit, indicatedgenerally at 14, having a top duct and connector spaced lugs zll'around the exterior of the open mouth end, each said lug being formed to present an arcuate ledge 22, with a diametrically opposite pair of the lugs also formed with transversely extending openings 24 for the pivotal mounting of the bail 18.

The combined cover and filter unit 14 comprises the cover proper, which may be in the form of a sheet metal stamping shaped to provide an upper smaller dome 26 and a lower larger and concentric dome 28 presenting a peripheral edge 30 which is adapted to seat against thespaced ledges 22 and thereby properly locate the unit in position on the body 'part with its filter body 32 suspended in the body It as indicated in Fig. I. Such locating of the unit 14 is facilitated by the telescopic or guided engagement of the cover with respect to thekupstanding arcuate facial surfaces 34 on the lugs 28.

The top of the cover has a central opening 36 and an associated packing ring 38 with respect to which the duct piece 16 is adapted to have sealing engagement when held thereto by the action of the bail l8, the latter having inturned pivot forming ends 40 engaged in said lug openings 24 and being capable of being sprung over the top of the duct piece IE to engage a transversely extending shallow channel 42 and thus resiliently urge the duct piece upon its sealing seat 28 as well as urging the cover against its seating lug surfaces 22. When so positioned arcuate openings 44 are left around the top of the body part l8, between the lugs 20, through which an air flow is possible, as indicated by the arrows at in Fig. I, these and the remaining arrows in that figure indicating the general direction of flow of the air through the cleaner apparatus.

The duct piece It is shown with a pair of elongated bores 46 (Figure III). These serve to receive bolt members (not shown) by which the air cleaner apparatus as a whole can be secured in position on an automobile, for example.

The body I!) is provided with high and low liquid level markings as seen in Fig. I. As stated, the body is formed from light transmitting material and this possesses the important advantage that these liquid levels can be read against the liquid as seen in the bottom of the body l9 by observation from the outside and thereby obviates the necessity of dismantling the component parts of the cleaner apparatus. These parts, however, can be rapidly and easily dismantled whenever desired simply by releasing the bail [8.

Having thus described my invention, what I claim as novel and wish to secure by Letters Patent is as follows:

In a liquid bath air cleaning apparatus, a 1101- low body part adapted to support a body of oil or other suitable liquid, said body part being of cylindrical formation and open at the top, the bottom being closed, supporting ledge surfaces defined around said top at spaced intervals and radially disposed outwardly from the main interior wall of said body part, and a combined filter unit and cover, said cover being adapted to fit onto said body part with the filter unit suspended within the body interior, and said cover including a peripheral skirt of larger diameter than the open end of said body part and defining a complementary surface portion adapted for seating engagement with said ledge surfaces to support said filter unit in said suspended relation with the formation of arcuate air inflow passages to the body interior defined between" said skirt and the open top of the said body part between said radially disposed supporting ledge surfaces.

JOHN H. MILLS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,714,854 Dollinger May 28, 1929 2,020,903 Nickelsen Nov. 12, 1935 2,297,934 Baily Oct .6, 1942 2,405,494 Dupuy Aug. 6, 1946 2,483,588 Mallory Oct. 4, 1949 FOREIGN PATENTS Number Country Date 603,846 Great Britain June 24, 1948 

